An Improved Orbital Ephemeris for Cygnus X-1

Simple item page
dc.creatorBrocksopp, C.
dc.creatorTarasov, A. E.
dc.creatorLyuty, V. M.
dc.creatorRoche, P.
dc.date1998-12-03
dc.date.accessioned2026-07-07T02:29:28Z
dc.date.available2026-07-07T02:29:28Z
dc.descriptionBy accumulating all available radial velocity data and combining it with our own spectroscopy we present a new and improved ephemeris for Cygnus X-1 (V1357 Cygni/HDE226868). We initially calculate an orbital period of 5.599847+/-0.000018.days and then, by including the more recent radial velocities of LaSala et al. (1998) and Sowers et al.(1998) we refine this to 5.599829+/-0.000016 days. Using 27 years' worth of photometry, we also calculate a photometric period of 5.599836+/-0.000024 - remarkably similar to the spectroscopic one.
dc.descriptionAccepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/9812077
dc.identifierhttp://arxiv.org/abs/astro-ph/9812077
dc.identifierA&A, 343, 861
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/13488
dc.subjectAstrophysics
dc.titleAn Improved Orbital Ephemeris for Cygnus X-1
dc.typetext

Files

Collections

arXiv